| Project/Area Number |
24651009
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Hiroshima University |
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Principal Investigator |
OKUDA TETSUJI 広島大学, 環境安全センター, 助教 (60343290)
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| Co-Investigator(Kenkyū-buntansha) |
HAYAKAWA Shinjirou 広島大学, 工学研究科, 准教授 (80222222)
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIJIMA Wataru 広島大学, 環境安全センター, 教授 (20243602)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 珊瑚 / 鉛 / 重金属 / 汚染 / 散乱Ｘ線 / 蛍光X線 / 定量分析 / 環境計測 / 蛍光Ｘ線分析 / 汚染履歴 / 河川水 / 蛍光X線分析 / 散乱X線 |
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| Research Abstract |
In Dominican Republic, we could find and sample some corals survived from 2000 year in the mouth of river in which watershed areas had extensive lead pollution at around 2000. In addition, we analyzed lead concentration for two corals in captivity by the conventional methods, after one year cultivation with lead polluted artificial seawater of one week. It was found that three conventional methods has enough higher resolution (10 micro meter) but doesn't have sensibility to detect lead accumulated in environ.
Improvements in micro x-ray fluorescence analyzer were carried out to detect Ba L lines in coral under atmospheric condition. A special collimator was placed between a sample and the detector, and the interior of the collimator could be evacuated. The sensitivity for Mg and Ka line was gained more than 1000, and the present instrument can be applied to perform quantitative analysis of Fe in the light matrix down to several ppm levels.
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